In April 2025, Andrei focused on improving type safety and maintainability in the ardatan/whatwg-node repository by addressing a compatibility issue with TypeScript type definitions. He replaced the deprecated VoidFunction type with the more current () => void signature throughout the codebase, ensuring better alignment with evolving TypeScript standards and reducing downstream type errors. This targeted refactor, implemented in a single, well-documented commit, enhanced the reliability of Promise helpers and streamlined integration for future updates. Andrei’s work leveraged his skills in Node.js, TypeScript, and testing, demonstrating careful attention to code health and long-term maintainability within the project.